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TECHNICAL PAPERS

Scaling of Tip Vortex Cavitation Inception Noise With a Bubble Dynamics Model Accounting for Nuclei Size Distribution

[+] Author and Article Information
Chao-Tsung Hsiao, Georges L. Chahine

Dynaflow, Inc. 10621-J Iron Bridge Road, Jessup, MD 20794

J. Fluids Eng 127(1), 55-65 (Mar 22, 2005) (11 pages) doi:10.1115/1.1852476 History: Received September 13, 2003; Revised August 13, 2004; Online March 22, 2005
Copyright © 2005 by ASME
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References

Figures

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The location and size of a fictitious volume for randomly distributing the nuclei
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Computational domain and grid for the current study
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Pressure coefficient variations along the NACA16020 elliptic foil for three values of the Reynolds number
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Comparison of tangential and axial velocity components across the tip vortex core at x/C0=0.1 and 0.3 between present numerical result and experimental measurements (Fruman et al. 1992)
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Example computation of bubble dynamics for bubble radius, encountered pressure, and emitted acoustic pressure versus time during bubble capture in the tip vortex
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Contours of the minimum pressure coefficient encountered at high cavitation number for different nuclei size in the small foil scale
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Contours of the minimum pressure coefficient encountered at high cavitation number for R0=20 μm and for the medium and large foil scale
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Nuclei size number density distributions applied at the three scales
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The number of nuclei released and the number of nuclei reaching critical pressure (cavitating) versus nuclei size obtained at σ=3.0 for two different acquisition times
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The acoustic signals for the small scale at three different cavitation numbers
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The acoustic signals for the medium scale at three different cavitation numbers
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The acoustic signals for the large scale at three different cavitation numbers
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Amplitude spectra for all three scales at three different cavitation numbers
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Number of pressure peaks versus cavitation number deduced at two criteria of acoustic level for the three scales considered
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The acoustic signals for the small scale at σ=3.0 using the smaller nuclei size range (1–10 μm)
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The number of nuclei released and the number of nuclei cavitating versus nuclei size obtained for the 1–10 μm small nuclei size distribution at σ=3.0
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Number of pressure peaks versus cavitation number deduced at two criteria of acoustic level for the small and large scales considered

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